CN111679445A - Light field display device and stereoscopic display method - Google Patents
Light field display device and stereoscopic display method Download PDFInfo
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- CN111679445A CN111679445A CN202010561156.2A CN202010561156A CN111679445A CN 111679445 A CN111679445 A CN 111679445A CN 202010561156 A CN202010561156 A CN 202010561156A CN 111679445 A CN111679445 A CN 111679445A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/50—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels
- G02B30/52—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels the 3D volume being constructed from a stack or sequence of 2D planes, e.g. depth sampling systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
Abstract
The invention discloses a light field display device and a stereoscopic display method, and belongs to the technical field of stereoscopic display. The light field display device comprises display equipment, a micro-lens array, a transmission display body and a driving assembly, wherein the display equipment respectively analyzes a shallow depth of field part, a middle depth of field part and a high depth of field part in each frame of picture and respectively displays the shallow depth of field part, the middle depth of field part and the high depth of field part, and meanwhile, the driving assembly controls the micro-lens array to move to a corresponding area according to the content currently displayed by the display equipment so as to respectively project the shallow depth of field part to a real image display area of the transmission display body, project the middle depth of field part to a focusing display surface of the transmission display body and project the high depth of field part to a virtual image display area of the transmission display body. According to the technical scheme, multi-depth-of-field and multi-picture superposed three-dimensional display can be realized, and real three-dimensional display experience is achieved.
Description
Technical Field
The invention relates to the technical field of stereoscopic display, in particular to a light field display device and a stereoscopic display method.
Background
With the development of information technology, the public has a greater demand for three-dimensional display technology. The current three-dimensional display scheme applied to the market is realized based on binocular parallax, the left eye and the right eye see different pictures, and the two pictures finally form a picture with a three-dimensional effect in the brain. Although the stereo display scheme has certain stereo display effect, the depth of field of the picture is very small, and the resolution and the visual angle of the displayed picture are also very limited.
Disclosure of Invention
The invention mainly aims to provide a light field display device and a three-dimensional display method, and aims to solve the technical problems that the depth of field of a picture is very small, and the resolution and the visual angle of the displayed picture are also very limited in the conventional three-dimensional display scheme.
To achieve the above object, the present invention provides a light field display device including: the display equipment is used for respectively displaying the shallow depth of field part, the medium depth of field part and the high depth of field part in each frame of picture; the transmission display body is positioned on one side of the display equipment and comprises a real image display area, a focusing display surface and a virtual image display area which are sequentially stacked, and the distance between the real image display area and the display equipment is greater than the distance between the virtual image display area and the display equipment; a microlens array positioned between the display device and the transmissive display volume, the microlens array moving between the display device and the transmissive display volume to project the shallow depth of field portion to the real image display area, the medium depth of field portion to the focused display surface, and the high depth of field portion to the virtual image display area, respectively; a driving assembly for driving the microlens array to move between the display device and the transmissive display.
Optionally, the drive assembly comprises: a first motor having at least a first output shaft; the first ratchet wheel chain wheel is connected to the first output shaft; a second motor having at least a second output shaft; the second ratchet wheel chain wheel is arranged on the second output shaft, and the working direction of the second ratchet wheel chain wheel is opposite to that of the first ratchet wheel chain wheel; the two ends of the chain are respectively sleeved outside the first ratchet wheel chain wheel and the second ratchet wheel chain wheel, and the micro-lens array is connected with the chain.
Optionally, the light field display apparatus further includes a frame for supporting the display device, the microlens array, and the transmissive display, and the frame is provided with a sliding groove; the driving assembly further comprises a sliding shaft, one end of the sliding shaft is connected with the micro lens array, and the sliding shaft is connected to the chain.
Optionally, the drive assembly comprises: a motor having at least one output shaft; a driving pulley connected to the output shaft; a driven shaft arranged in parallel with the output shaft; a driven pulley connected to the driven shaft; the synchronous belt, the relative both ends of synchronous belt are established respectively the driving pulley with outside the driven pulley, the microlens array with the synchronous belt is connected.
Optionally, the drive assembly comprises: a motor having at least one output shaft; the driving chain wheel is connected to the output shaft; a driven shaft arranged in parallel with the output shaft; a driven sprocket connected to the driven shaft; the two ends of the chain are respectively sleeved outside the driving chain wheel and the driven chain wheel, and the micro-lens array is connected with the chain.
Optionally, the light field display apparatus further includes a planar lens, and the planar lens is laid on the surface of the display device, and is configured to converge the content currently displayed by the display device, so as to reduce the probability of dispersion occurring in the display device.
In addition, to achieve the above object, the present invention further provides a stereoscopic display method, including the steps of: the method comprises the steps that a shallow depth of field part in a current frame picture is analyzed through system calculation, analyzed first image data are output to display equipment to be displayed, and meanwhile, a micro lens array is controlled to move to a first preset area, so that the content currently displayed by the display equipment is projected to a real image display area of a transmission display body through the micro lens array; resolving the middle scene deep part in the current frame picture through system calculation, outputting the resolved second image data to the display equipment for displaying, and simultaneously controlling the micro lens array to move to a second preset area so as to project the content currently displayed by the display equipment to the focusing display surface of the transmission display body through the micro lens array; the high depth of field part in the current frame picture is analyzed through system calculation, the analyzed third image data is output to display equipment to be displayed, and meanwhile, the micro lens array is controlled to move to a third preset area, so that the content displayed currently by the display equipment is projected to a virtual image display area of the transmission display body through the micro lens array.
Optionally, the microlens array includes a plurality of lens elements arranged in an array, and a diameter of each lens element is in positive correlation with a pixel pitch of the LED display screen.
Optionally, when the microlens array moves to the first preset area, the vertical distance from the microlens array to the display device is greater than the focal length of the lens element; when the micro lens array moves to the second preset area, the vertical distance from the micro lens array to the display device is equal to the focal length of the lens unit; when the micro lens array moves to the third preset area, the vertical distance from the micro lens array to the display device is smaller than the focal length of the lens unit.
Optionally, a planar lens is laid on the surface of the display device to converge the content currently displayed by the display device, so as to reduce the probability of dispersion of the LED display screen.
The invention provides a light field display device and a three-dimensional display method. When the display device works, the display device analyzes the shallow depth of field part, the middle depth of field part and the high depth of field part in each frame of picture respectively and displays the parts respectively, and meanwhile, the driving assembly controls the micro lens array to move to the corresponding area according to the content currently displayed by the display device so as to respectively project the shallow depth of field part to the real image display area of the transmission display body, project the middle depth of field part to the focusing display surface of the transmission display body and project the high depth of field part to the virtual image display area of the transmission display body. At this time, the images with excellent stereoscopic effect can be formed by superposition based on the space-time multiplexing principle. The light field display device can realize multi-depth-of-field and multi-picture superimposed three-dimensional display through three-layer picture display, and has the advantages of high picture brightness, high resolution, good three-dimensional display effect and real three-dimensional display experience. Therefore, the technical scheme can effectively solve the technical problems of small depth of field of the picture, and limited resolution and visual angle of the displayed picture in the conventional three-dimensional display scheme.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structure diagram of a light field display device according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a driving assembly of the light field display device shown in fig. 1.
Fig. 3 is another structural diagram of a driving assembly of the light field display device shown in fig. 1.
Fig. 4 is a flowchart of a stereoscopic display method according to a second embodiment of the invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
As shown in fig. 1, an embodiment of the invention provides a light field display apparatus 100, where the light field display apparatus 100 includes a display device 110, a microlens array 120, a transmissive display 130, and a driving component 140, where the display device 110 is mainly used for respectively displaying a shallow depth of field portion, a middle depth of field portion, and a high depth of field portion in each frame of a picture. The transmissive display 130 is located on one side of the display device 110, and includes a real image display region 131, a focus display surface 132, and a virtual image display region 133 that are sequentially stacked, and a distance between the real image display region 131 and the display device 110 is greater than a distance between the virtual image display region 133 and the display device 110. The microlens array 120 is positioned between the display device 110 and the transmissive display 130, and the microlens array 120 is moved between the display device 110 and the transmissive display 130 to project the shallow depth of field portion to the real image display region 131, the medium depth of field portion to the focused display surface 132, and the high depth of field portion to the virtual image display region 133, respectively. The driving assembly 140 is mainly used for driving the microlens array 120 to move between the display device 110 and the transmissive display 130.
In the embodiment, as shown in fig. 1, the display device 110 is not limited to the small-pitch LED display screen and the Micro/MiniLED display screen, and the smaller the pixel pitch, the better the display effect. Meanwhile, the display device 110 needs to satisfy the requirement of a high refresh rate. It will be appreciated that in some other embodiments, the display device 110 may be replaced with an LCD display screen, a 0LED display screen, or other display device. The light field display apparatus 100 further includes a planar lens 150, where the planar lens 150 is laid on a display surface of the display device 110, and is used to converge the content currently displayed by the display device 110, so as to reduce the probability of dispersion occurring in the display device 110. The microlens array 120 includes a plurality of lens elements 121 arranged in an array, and the diameter of each lens element 121 is in positive correlation with the pixel pitch of the display device 110. That is, the pixel pitch of the display device 110 is different in size, and the diameter of the lens element 121 disposed on the microlens array 120 is also different, and the diameter of the lens element 121 is also reduced as the pixel pitch of the display device 110 is reduced. Meanwhile, the number of lens elements 121 of the microlens array 120 is proportionally set according to the number of lenses or lenses of an image pickup apparatus (i.e., an apparatus used when a video material currently displayed by the display apparatus 110 is photographed).
In addition, as shown in fig. 1 and fig. 2, the driving assembly 140 includes a first motor 141, a first ratchet sprocket 142, a second motor 143, a second ratchet sprocket 144 and a chain 145, wherein the first motor 141 has at least one first output shaft 1411, the first ratchet sprocket 142 is connected to the first output shaft 1411, the second motor 143 has at least one second output shaft 1431, the second ratchet sprocket 144 is disposed on the second output shaft 1431, the working direction of the second ratchet sprocket 144 is opposite to the working direction of the first ratchet sprocket 142, two ends of the chain 145 are respectively sleeved outside the first ratchet sprocket 142 and the second ratchet sprocket 144, and the microlens array 120 is connected to the chain 145. The light field display apparatus 100 further includes a frame 150 for supporting the display device 110, the microlens array 120, and the transmissive display body 130, wherein a chute (not shown) is provided on the frame 150; the driving assembly 140 further includes a sliding shaft 146, one end of the sliding shaft 146 is connected to the microlens array 120, and the sliding shaft 146 is connected to the chain 145. The persistence effect of human eyes is 0.2s, the rotating speed of the existing loose servo motor A6 series reaches 6500r/min, 21 turns can be achieved every 0.2s, the accuracy reaches 0.001mm, and high-frequency rotation can be achieved. During operation of the drive assembly 140, the sliding shaft 146 is free to move along the sliding slot. The vertical distance g from the microlens array 120 to the display device 110 changes continuously with the movement of the microlens array 120, and the focal length f of the lens elements does not change, so the imaging distance L changes continuously. By comparing with f, the movement driving assembly 171 forms three movement control regions, a first preset region 101 when g > f, a second preset region 102 when g ═ f, and a third preset region 103 when g < f. The transmissive display 130 is disposed above the microlens array 120, and the transmissive display 130 is divided into three regions, namely, a real image display region 131, a focusing display surface 132, and a virtual image display region 133. The thickness of the transmissive display 130 and the thickness of each display region are related to the moving range of the microlens array 120, and the thickness of each portion of the transmissive display 130 is determined by determining the moving distance of the three movement control regions. The position of the display frame in the display area is determined by the motion control area, and when the microlens array 120 is in the first predetermined area 101, the display frame will fall in the real image display area 131; when the microlens array 120 is in the second predetermined region 102, the display image will fall on the focusing display surface 132; when the microlens array 120 is in the third predetermined region 103, the display image falls on the virtual image display region 133.
It is understood that the above-mentioned driving assembly 140 can be replaced by the driving assembly 240 shown in fig. 3, the driving assembly 240 includes a motor 241, a driving pulley 242, a driven shaft 243, a driven pulley 244 and a timing belt 245, the motor 241 has at least one output shaft 2411, the driving pulley 242 is connected to the output shaft 2411, the driven shaft 243 is arranged in parallel with the output shaft 2411, and the driven pulley 244 is connected to the driven shaft 243; the opposite ends of the synchronous belt 245 are respectively sleeved outside the driving pulley 242 and the driven pulley 244, and the microlens array 120 is connected with the synchronous belt 245. Similar to the driving assembly 140, the driving assembly 240 may also be provided with a sliding shaft 246, one end of the sliding shaft 246 is connected to the microlens array 120, and the sliding shaft 246 is connected to the timing belt 245. The sliding shaft 246 is free to move along the sliding slot when the driving assembly 240 is operated. It is also possible for those skilled in the art to replace the drive pulley 242 with a drive sprocket, the driven pulley 244 with a driven sprocket, and the timing belt 245 with a chain.
When the display device 110 plays a 3D image, a frame of display image is sequentially analyzed to obtain a shallow depth of field portion, a middle depth of field portion, and a high depth of field portion (or sequentially analyzed to obtain a high depth of field portion, a middle depth of field portion, and a shallow depth of field portion) under system control, that is, the display of a frame of image can be divided into three layers of image overlap, during the persistence time of vision of human eyes, the driving component 140 is driven by a motor to move the sliding shaft along the sliding groove, so that the three movement control regions of the microlens array 120 (including the first predetermined region 101 when g > f, the second predetermined region 102 when g ═ f, and the third predetermined region 103 when g < f) move back and forth to form a plurality of depth of fields and display images. The different moving distances of the microlens array 120 are respectively displayed in the transmissive display 130, the moving positions of the microlens array 120 are different, the thicknesses of the display frames of the transmissive display 130 are different, and the display frames at the different thicknesses are combined into a complete three-dimensional image within a visual time difference. The stereo image has full parallax, multiple depth of field and super-strong stereo sense.
Example two
As shown in fig. 4, a second embodiment of the present invention provides a stereoscopic display method, which is applied to the light field display device 100 in the first embodiment, and the stereoscopic display method includes the following steps:
step S110: the shallow depth of field part in the current frame picture is analyzed through system calculation, the analyzed first image data is output to display equipment to be displayed, and meanwhile, the micro lens array is controlled to move to a first preset area, so that the content currently displayed by the display equipment is projected to a real image display area of a transmission display body through the micro lens array.
Specifically, as shown in fig. 1, the light field display apparatus 100 includes a display device 110, a microlens array 120, a transmissive display 130, and a main controller 140, wherein the display device 110 is not limited to a small pitch LED display screen and a Micro/Mini LED display screen, and the smaller the pixel pitch, the better the display effect. Meanwhile, the display device 110 needs to satisfy the requirement of a high refresh rate. It will be appreciated that in some other embodiments, the display device 110 may be replaced with an LCD display screen, a 0LED display screen, or other display device. The light field display apparatus 100 further includes a planar lens 150, which is disposed on a display surface of the display device 110, and is used for converging content currently displayed by the display device 110 and reducing the probability of dispersion occurring in the display device 110. The microlens array 120 includes a plurality of lens elements 121 arranged in an array, and the diameter of each lens element 121 is in positive correlation with the pixel pitch of the display device 110. That is, the pixel pitch of the display device 110 is different in size, and the diameter of the lens element 121 disposed on the microlens array 120 is also different, and the diameter of the lens element 121 is also reduced as the pixel pitch of the display device 110 is reduced. Meanwhile, the number of lens elements 121 of the microlens array 120 is proportionally set according to the number of lenses or lenses of an image pickup apparatus (i.e., an apparatus used when a video material currently displayed by the display apparatus 110 is photographed).
When the display device 110 plays a 3D image, a frame of display image is under system control, and according to system settings, the display of the frame of display image can be divided into three layers of image superposition, that is, a shallow depth of field in the current frame of display image is resolved by the system calculation, and the resolved first image data is output to the display device 110 for display, and at the same time, the microlens array 120 is controlled to move to the first preset region 101, so as to project the content currently displayed by the display device 110 to the real image display region 131 of the transmissive display 130 through the microlens array 120, and when the microlens array 120 moves to the first preset region 101, the vertical distance g from the microlens array 120 to the display device 110 is greater than the focal length f of the lens element 121, that is, g > f.
Step S120: and resolving the middle scene deep part in the current frame picture through system calculation, outputting the resolved second image data to display equipment for displaying, and simultaneously controlling the micro-lens array to move to a second preset area so as to project the content currently displayed by the display equipment to the focusing display surface of the transmission display body through the micro-lens array.
Specifically, as shown in fig. 1, after the display device 110 completes the display of the shallow depth of field portion, the system calculates to resolve the middle depth of field portion in the current frame picture, and outputs the resolved second image data to the display device 110 for display, and at the same time, controls the microlens array 120 to move to the second preset region 102, so as to project the content currently displayed by the display device 110 to the focusing display surface 132 of the transmissive display 130 through the microlens array 120, and when the microlens array 120 moves to the second preset region 102, the vertical distance g from the microlens array 120 to the display device 110 is equal to the focal length f of the lens element, that is, g ═ f.
Step S130: and the high depth of field part in the current frame picture is analyzed through system calculation, the analyzed third image data is output to the display equipment for display, and meanwhile, the micro lens array is controlled to move to a third preset area so as to project the content currently displayed by the display equipment to a virtual image display area of the transmission display body through the micro lens array.
Specifically, as shown in fig. 1, after the display device 110 completes the display of the middle depth of field portion, the high depth of field portion in the current frame picture is then analyzed by the system calculation, and the analyzed third image data is output to the display device 110 for display, while the microlens array 120 is controlled to move to the third preset region 103, so as to project the content currently displayed by the display device 110 to the virtual image display region 133 of the transmissive display 130 through the microlens array 120, and when the microlens array 120 moves to the third preset region 103, the vertical distance g from the microlens array 120 to the display device 110 is smaller than the focal length f of the lens elements, that is, g < f. At this time, the shallow depth of field portion, the middle depth of field portion, and the high depth of field portion in one frame of picture are sequentially projected on the real image display area, the focusing display surface, and the virtual image display area of the transmissive display body, and at this time, the display pictures in each area can be synthesized into a complete stereoscopic image within a visual time difference. The stereo image has full parallax, multiple depth of field and super-strong stereo sense.
The light field display device comprises a display device, a micro lens array, a transmission display body and a driving assembly. When the display device works, the display device analyzes the shallow depth of field part, the middle depth of field part and the high depth of field part in each frame of picture respectively and displays the parts respectively, and meanwhile, the driving assembly controls the micro lens array to move to the corresponding area according to the content currently displayed by the display device so as to respectively project the shallow depth of field part to the real image display area of the transmission display body, project the middle depth of field part to the focusing display surface of the transmission display body and project the high depth of field part to the virtual image display area of the transmission display body. At this time, the images with excellent stereoscopic effect can be formed by superposition based on the space-time multiplexing principle. The light field display device can realize multi-depth-of-field and multi-picture superimposed three-dimensional display through three-layer picture display, and has the advantages of high picture brightness, high resolution, good three-dimensional display effect and real three-dimensional display experience. Therefore, the technical scheme can effectively solve the technical problems of small depth of field of the picture, and limited resolution and visual angle of the displayed picture in the conventional three-dimensional display scheme.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (10)
1. A light field display device, characterized in that it comprises:
the display equipment is used for respectively displaying the shallow depth of field part, the medium depth of field part and the high depth of field part in each frame of picture;
the transmission display body is positioned on one side of the display equipment and comprises a real image display area, a focusing display surface and a virtual image display area which are sequentially stacked, and the distance between the real image display area and the display equipment is greater than the distance between the virtual image display area and the display equipment;
a microlens array positioned between the display device and the transmissive display volume, the microlens array moving between the display device and the transmissive display volume to project the shallow depth of field portion to the real image display area, the medium depth of field portion to the focused display surface, and the high depth of field portion to the virtual image display area, respectively;
a driving assembly for driving the microlens array to move between the display device and the transmissive display.
2. A light field display device as claimed in claim 1, characterized in that the drive assembly comprises:
a first motor having at least a first output shaft;
the first ratchet wheel chain wheel is connected to the first output shaft;
a second motor having at least a second output shaft;
the second ratchet wheel chain wheel is arranged on the second output shaft, and the working direction of the second ratchet wheel chain wheel is opposite to that of the first ratchet wheel chain wheel;
the two ends of the chain are respectively sleeved outside the first ratchet wheel chain wheel and the second ratchet wheel chain wheel, and the micro-lens array is connected with the chain.
3. A light field display apparatus as claimed in claim 2, characterized in that the light field display apparatus further comprises a frame for supporting the display device, the microlens array and the transmissive display body, the frame being provided with a slide groove; the driving assembly further comprises a sliding shaft, one end of the sliding shaft is connected with the micro lens array, and the sliding shaft is connected to the chain.
4. A light field display device as claimed in claim 1, characterized in that the drive assembly comprises:
a motor having at least one output shaft;
a driving pulley connected to the output shaft;
a driven shaft arranged in parallel with the output shaft;
a driven pulley connected to the driven shaft;
the synchronous belt, the relative both ends of synchronous belt are established respectively the driving pulley with outside the driven pulley, the microlens array with the synchronous belt is connected.
5. A light field display device as claimed in claim 1, characterized in that the drive assembly comprises:
a motor having at least one output shaft;
the driving chain wheel is connected to the output shaft;
a driven shaft arranged in parallel with the output shaft;
a driven sprocket connected to the driven shaft;
the two ends of the chain are respectively sleeved outside the driving chain wheel and the driven chain wheel, and the micro-lens array is connected with the chain.
6. The light field display device according to any one of claims 1 to 5, further comprising a planar lens, wherein the planar lens is disposed on a display surface of the display device, and is configured to converge content currently displayed by the display device, so as to reduce the probability of dispersion occurring in the display device.
7. A stereoscopic display method, characterized in that it comprises the following steps:
the method comprises the steps that a shallow depth of field part in a current frame picture is analyzed through system calculation, analyzed first image data are output to display equipment to be displayed, and meanwhile, a micro lens array is controlled to move to a first preset area, so that the content currently displayed by the display equipment is projected to a real image display area of a transmission display body through the micro lens array;
resolving the middle scene deep part in the current frame picture through system calculation, outputting the resolved second image data to the display equipment for displaying, and simultaneously controlling the micro lens array to move to a second preset area so as to project the content currently displayed by the display equipment to the focusing display surface of the transmission display body through the micro lens array;
the high depth of field part in the current frame picture is analyzed through system calculation, the analyzed third image data is output to display equipment to be displayed, and meanwhile, the micro lens array is controlled to move to a third preset area, so that the content displayed currently by the display equipment is projected to a virtual image display area of the transmission display body through the micro lens array.
8. The stereoscopic display method of claim 7, wherein the micro-lens array comprises a plurality of lens elements arranged in an array, and the diameter of each lens element is in positive correlation with the pixel pitch of the LED display screen.
9. The stereoscopic display method according to claim 7, wherein when the micro lens array is moved to the first preset area, a vertical distance from the micro lens array to the display device is greater than a focal length of the lens element; when the micro lens array moves to the second preset area, the vertical distance from the micro lens array to the display device is equal to the focal length of the lens unit; when the micro lens array moves to the third preset area, the vertical distance from the micro lens array to the display device is smaller than the focal length of the lens unit.
10. The stereoscopic display method according to any one of claims 7 to 9, wherein a surface of the display device is paved with a planar lens to converge the content currently displayed by the display device, so as to reduce the probability of dispersion of the LED display screen.
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| CN113009604A (en) * | 2021-02-20 | 2021-06-22 | 京东方科技集团股份有限公司 | Micro-lens array, 3D display device and preparation method thereof |
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